PRESENTE
I am seen, soy visto
you are seen, eres visto
he is seen, es visto
we are seen, somos vistos
you are seen, sois vistos
they are seen, son vistos

PRETERITO PERFECTO
I have been seen, he sido visto
you have been seen, has sido visto
he has been seen, ha sido visto
we have been seen, hemos sido vistos
you have been seen, habéis sido vistos
they have been seen, han sido vistos

PASADO
I was seen, fui visto
you were seen, fuiste visto
he was seen, fue visto
we were seen, fuimos vistos
you were seen, fuisteis vistos
they were seen, fueron vistos

FUTURO
I shall be seen, seré visto
you will be seen, serás visto
he will be seen, será visto
we shall be seen, seremos vistos
you will be seen, seréis vistos
they will be seen, serán vistos

PRETERITO
PLUSCUAMPERFECTO: I had been seen, había sido vistoCONDICIONAL: I should be seen, sería visto
FUTURO PERFECTO: I shall have been seen, habré sido visto
CONDICIONAL PERFECTO: I should have been seen, habría sido visto

VOZ ACTIVATom writes a letter
Tom is writing a letter
Tom was writing a letter
Tom wrote a letter
Tom has written a letter
Tom had written a letter
Tom will write a letter
Tom is going to write a letter
Tom can write a letter
Tom could write a letter
Tom must write a letter
Tom may write a letter
Tom might write a letter

VOZ PASIVAA letter is written by Tom
A letter is being written by Tom
A letter was being written by Tom
A letter was written by Tom
A letter has been written by Tom
A letter had been written by Tom
A letter will be written by Tom
A letter is going to be written by Tom
A letter can be written by Tom
A letter could be written by Tom
A letter must be written by Tom
A letter may be written...
A letter might be written...